/* ============================================================
   LC ATELIER — Sistema compartido
   ============================================================ */
:root{
  --ink:#14110d;
  --ink-2:#1a1611;
  --ink-3:#221c16;
  --ink-4:#2a231b;
  --paper:#efe9df;
  --paper-2:#e7dfd2;
  --text:#ece5d9;
  --text-dim:#a89e8e;
  --text-faint:#7c7264;
  --line:rgba(236,229,217,.13);
  --line-strong:rgba(236,229,217,.22);

  --copper-h:54;
  --copper-c:.085;
  --copper-l:.70;
  --copper:oklch(var(--copper-l) var(--copper-c) var(--copper-h));
  --copper-soft:oklch(var(--copper-l) calc(var(--copper-c) * .55) var(--copper-h));
  --copper-deep:oklch(.55 calc(var(--copper-c) + .015) calc(var(--copper-h) - 4));

  --font-display:'Cormorant Garamond', Georgia, serif;
  --font-sans:'Hanken Grotesk', system-ui, sans-serif;
  --font-mono:'Space Mono', ui-monospace, monospace;

  --space:1;
  --maxw:1340px;
  --pad:clamp(22px, 5vw, 84px);
  --section-y:calc(clamp(88px, 11vw, 168px) * var(--space));
}

*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}
body{
  background:var(--ink);color:var(--text);
  font-family:var(--font-sans);font-weight:300;font-size:17px;line-height:1.62;
  letter-spacing:.005em;overflow-x:hidden;
}
img{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
::selection{background:var(--copper-deep);color:#fff}

/* ---------- helpers ---------- */
.wrap{max-width:var(--maxw);margin:0 auto;padding-inline:var(--pad)}
.wrap-wide{max-width:1560px;margin:0 auto;padding-inline:var(--pad)}
.eyebrow{font-family:var(--font-mono);font-size:11.5px;letter-spacing:.22em;text-transform:uppercase;
  color:var(--copper-soft);font-weight:400;display:inline-flex;align-items:center;gap:.85em}
.eyebrow::before{content:"";width:26px;height:1px;background:var(--copper);opacity:.7}
.eyebrow.no-tick::before{display:none}
.idx{font-family:var(--font-mono);font-size:12px;letter-spacing:.12em;color:var(--text-faint)}

h1,h2,h3{font-family:var(--font-display);font-weight:400;line-height:1.04;letter-spacing:-.01em}
.display{font-family:var(--font-display);font-weight:300;line-height:1.02;letter-spacing:-.015em;
  font-size:clamp(40px,6.4vw,104px)}
.t-serif{font-family:var(--font-display)}
.lede{font-family:var(--font-display);font-weight:300;font-size:clamp(24px,3.1vw,42px);
  line-height:1.3;letter-spacing:-.01em;color:var(--text)}
.muted{color:var(--text-dim)}
.faint{color:var(--text-faint)}
em,.it{font-style:italic}

.shead{display:flex;align-items:flex-end;justify-content:space-between;gap:30px;flex-wrap:wrap;
  margin-bottom:clamp(40px,5vw,72px)}
.shead h2{font-size:clamp(30px,4vw,58px);max-width:16ch}
.shead .r{font-size:15px;color:var(--text-dim);max-width:34ch;line-height:1.55}

.btn-line{display:inline-flex;align-items:center;gap:13px;font-family:var(--font-mono);font-size:12px;
  letter-spacing:.14em;text-transform:uppercase;color:var(--text);border-bottom:1px solid var(--copper);
  padding-bottom:7px;transition:gap .3s, color .3s}
.btn-line:hover{gap:20px;color:var(--copper)}

/* ---------- placeholder ---------- */
.ph{position:relative;background-color:var(--ink-3);
  background-image:repeating-linear-gradient(135deg, transparent 0 13px, rgba(236,229,217,.022) 13px 14px);
  overflow:hidden}
.ph::after{content:"";position:absolute;inset:0;box-shadow:inset 0 0 0 1px var(--line);pointer-events:none}
.ph .ph-tag{position:absolute;left:18px;bottom:15px;font-family:var(--font-mono);font-size:10.5px;
  letter-spacing:.12em;text-transform:uppercase;color:var(--text-faint)}
.ph .ph-cn{position:absolute;top:14px;right:16px;width:13px;height:13px;
  border-top:1px solid var(--copper-soft);border-right:1px solid var(--copper-soft);opacity:.6}
.ph-lite{background-color:#ded4c5;background-image:repeating-linear-gradient(135deg,transparent 0 13px,rgba(60,48,34,.05) 13px 14px)}
.ph-lite::after{box-shadow:inset 0 0 0 1px rgba(60,48,34,.12)}
.ph-lite .ph-tag{color:#7a6c58}

/* ============================== HEADER ============================== */
header.site{position:fixed;top:0;left:0;right:0;z-index:80;
  transition:background .5s ease, border-color .5s ease;border-bottom:1px solid transparent}
header.site.solid{background:color-mix(in oklab, var(--ink) 80%, transparent);
  -webkit-backdrop-filter:blur(16px) saturate(140%);backdrop-filter:blur(16px) saturate(140%);
  border-bottom:1px solid var(--line)}
/* on dark pages the header text is light from the start */
header.site.on-dark .brand b,header.site.on-dark .brand small,
header.site.on-dark .nav-links a{color:var(--text)}
header.site.on-dark .menu-btn i{background:var(--text)}
.nav{display:flex;align-items:center;justify-content:space-between;height:78px}
.brand{display:flex;align-items:center;gap:13px}
.monogram{width:38px;height:38px;flex:none;display:grid;place-items:center;
  border:1px solid currentColor;border-radius:1px}
.monogram span{font-family:var(--font-display);font-weight:500;font-size:16px;letter-spacing:.04em;
  line-height:1;color:var(--copper)}
.brand-wm{display:flex;flex-direction:column;line-height:1}
.brand-wm b{font-family:var(--font-display);font-weight:500;font-size:20px;letter-spacing:.02em;color:var(--ink)}
.brand-wm small{font-family:var(--font-mono);font-size:8.5px;letter-spacing:.34em;text-transform:uppercase;
  margin-top:4px;opacity:.62;color:var(--ink)}
header.site.solid .brand b,header.site.solid .brand small{color:var(--text)}
.nav-links{display:flex;align-items:center;gap:clamp(18px,2.2vw,38px)}
.nav-links a{font-size:13px;letter-spacing:.04em;font-weight:400;color:var(--ink);position:relative;
  padding:6px 0;transition:color .5s, opacity .25s;opacity:.82}
header.site.solid .nav-links a{color:var(--text);opacity:.78}
.nav-links a:hover{opacity:1}
.nav-links a.active{color:var(--copper);opacity:1}
.nav-links a::after{content:"";position:absolute;left:0;bottom:0;height:1px;width:0;background:var(--copper);
  transition:width .35s cubic-bezier(.2,.7,.3,1)}
.nav-links a:hover::after,.nav-links a.active::after{width:100%}
.lang{display:flex;align-items:center;gap:7px;font-family:var(--font-mono);font-size:11px;
  letter-spacing:.1em;margin-left:6px;color:var(--ink)}
header.site.solid .lang{color:var(--text)}
.lang a{opacity:.4;transition:opacity .25s}
.lang a.on{opacity:1;color:var(--copper)}
.lang a:hover{opacity:.9}
.lang i{width:1px;height:11px;background:currentColor;opacity:.3}
.menu-btn{display:none}

/* ============================== FOOTER ============================== */
footer.site{background:var(--ink-2);border-top:1px solid var(--line);padding-block:clamp(56px,6vw,92px) 40px}
.foot-top{display:grid;grid-template-columns:1fr;gap:44px}
.foot-brand .brand b,.foot-brand .brand small{color:var(--text)}
.foot-brand p{margin-top:22px;max-width:34ch;font-size:14.5px;color:var(--text-faint);line-height:1.65}
.foot-cols{display:grid;grid-template-columns:repeat(2,1fr);gap:34px}
.foot-col h4{font-family:var(--font-mono);font-size:10.5px;letter-spacing:.14em;text-transform:uppercase;
  color:var(--text-faint);margin-bottom:18px;font-weight:400}
.foot-col a{display:block;font-size:14.5px;color:var(--text-dim);padding:5px 0;transition:color .25s}
.foot-col a:hover{color:var(--copper)}
.foot-bot{display:flex;align-items:center;justify-content:space-between;gap:20px;flex-wrap:wrap;
  margin-top:clamp(54px,6vw,86px);padding-top:26px;border-top:1px solid var(--line);
  font-family:var(--font-mono);font-size:11px;letter-spacing:.08em;color:var(--text-faint)}
@media(min-width:900px){.foot-top{grid-template-columns:1.3fr 1fr;gap:60px}.foot-cols{grid-template-columns:repeat(3,1fr)}}

/* ============================== REVEAL ============================== */
.rv{opacity:0;transform:translateY(26px);transition:opacity 1.1s cubic-bezier(.2,.7,.2,1),transform 1.1s cubic-bezier(.2,.7,.2,1)}
.rv.in{opacity:1;transform:none}
@media(prefers-reduced-motion:reduce){.rv{opacity:1;transform:none;transition:none}}

/* ============================== MOBILE NAV ============================== */
@media(max-width:880px){
  .nav-links{position:fixed;inset:0;flex-direction:column;justify-content:center;align-items:flex-start;
    gap:8px;padding:0 var(--pad);background:var(--ink);transform:translateX(100%);
    transition:transform .5s cubic-bezier(.5,.05,.2,1);z-index:90}
  .nav-links a{color:var(--text);font-family:var(--font-display);font-size:34px;font-weight:300;padding:10px 0;opacity:.9}
  .nav-links a::after{display:none}
  .nav-links .lang{margin:30px 0 0;font-size:13px;color:var(--text)}
  body.menu-open .nav-links{transform:none}
  .menu-btn{display:flex;flex-direction:column;justify-content:center;gap:5px;width:42px;height:42px;
    background:none;border:0;cursor:pointer;z-index:95}
  .menu-btn i{display:block;height:1.5px;width:24px;background:var(--ink);transition:transform .4s,background .4s,opacity .3s}
  header.site.solid .menu-btn i{background:var(--text)}
  body.menu-open .menu-btn i{background:var(--text)}
  body.menu-open .menu-btn i:nth-child(1){transform:translateY(6.5px) rotate(45deg)}
  body.menu-open .menu-btn i:nth-child(2){opacity:0}
  body.menu-open .menu-btn i:nth-child(3){transform:translateY(-6.5px) rotate(-45deg)}
}